A model for the operation of nitrous oxide monopropellant

Stabilization mechanism and crystallographic sites of Ru in Fe-promoted barium hexaaluminate under high-temperature condition for N2O decomposition

“…1c). Obviously, both the appearance of intermediate BaRuO 3 phase at x = 0.8 and the increase of the intensity of corresponding diffraction peak at x = 1 were much related to the Fe content in the hexaaluminate precursor. These results unambiguously indicated that the increase of Fe content promoted the formation of intermediate BaRuO 3 phase during calcination.…”

“…Increasing Fe content to x = 0.8 (BR0.2F0.8A-t, Fig. 4b), it is noteworthy that the intermediate BaRuO 3 phase was observed, although its intensity was very low. The diffraction peak of BaRuO 3 became sharper with further increasing the Fe content (x = 1, Fig.…”

“…The sample was then calcined at 500 • C, 700 • C, 900 • C, 1000 • C, 1100 • C, and 1200 • C for 4 h, to obtain BR0.2F1A-500, BR0.2F1A-700, BR0.2F1A-900, BR0.2F1A-1000, BR0.2F1A-1100, and BR0.2F1A-1200, respectively. To study the effect of Fe on the stabilization of Ru in Ru-substituted hexaaluminates, BaRu 0.2 Fe x Al 11.8−x O 19 -t samples with different Fe content (x = 0.5, 0.8, denoted as BR0.2F0.5A-t and BR0.2F0.8A-t, respectively) were also prepared by the abovedescribed procedure just by varying the amount of Fe(NO 3 …”

“…Zeng and Pang [12] developed a low-content (0.2 wt.%) Ru catalyst on alumina support, which showed excellent catalytic performance for N 2 O decomposition (4.8 × l0 4 mol (N 2 O) g −1 h −1 at 400 • C). Kawi et al [13] reported that Ru/MCM-41 catalyst prepared from Ru(OH) 3 was highly active for the catalytic decomposition of N 2 O, achieving a complete decomposition of N 2 O at 400 • C using a loading of 5.0 wt.% Ru.…”

“…N 2 O is being considered as a promising green propellant used for small satellite propulsion systems, due to its low toxicity compared with traditional hydrazine propellant, as well as its capability for self-pressurizing and compatibility with the common construction materials [1][2][3]. The chemistry for N 2 O as a propellant lies in the decomposition of N 2 O into N 2 and O 2 accompanies with a large amount of heat release and volume expansion, which can be used as propulsion power.…”